SDC MSB550 Series 48" Mechanic...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$297.00
$208.70
SDC MSB550 Series - 48" Mechanical Switch Bars

SDC MSB550 Series 48" Mechanical Switch Bar with Electromagnetic Lock Release

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Model: MSB550-2V48
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$297.00
$208.70
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SDC MSB550 Series 48"; Mechanical Switch Bar with Electromagnetic Lock Release

Professional Electromagnetic Lock Release Solution for Access-Controlled Doors

The SDC MSB550 Series 48"; Mechanical Switch Bar provides reliable electromagnetic lock release for commercial access control applications. Featuring heavy duty aluminum extrusion construction with metal caps and all-metal mounting assembly, this switch bar delivers quick and quiet operation with only 1/8"; total bar movement. UL 294 and UL 1034 certified for access control and burglary-resistant applications, the MSB550 meets building code requirements for uninhibited egress through access-controlled doors.

Professional Features & Benefits

  • Minimal Bar Movement: Only 1/8"; total bar movement ensures quick and quiet trigger activation for immediate electromagnetic lock release.
  • Heavy-Duty Construction: Aluminum extrusion with metal end caps and all-metal mounting assembly prevents malfunction due to sagging or warped doors.
  • High-Traffic Durability: Rigid construction designed for commercial applications with heavy use requirements.
  • Code Compliance Design: Meets building code requirements that egress through access-controlled doors must not require prior knowledge of operational requirements.
  • Low-Profile Installation: Narrow, low-profile design minimizes visual impact while providing reliable operation.
  • Complete Installation Package: Includes power transfer loop (PT-2U) for easy installation and troubleshooting.
  • Multiple Model Options: Available as MSB550, MSB550-2 (dual switch), and MSB550-2W (weatherized dual switch) for various applications.
  • UL Certifications: UL 294 Access Control System Units and UL 1034 Burglary-Resistant Electric Locking Mechanisms certified with CSFM listing.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Fire Rating: No
  • PDF:SDC Full Catalog: https://zensupply.com/content/pdf/lcn/CondensedHardwareBrochure
  • Product Category: Exit Devices and Trim
  • Product Group: Exit Devices and Trim
  • Product Model: MSB550, MSB550-2, MSB550-2W
  • Product Projection: 1-7/8";
  • Product Size: 48";
  • Product Subgroup: Exit Devices - Rim
  • Product Type: Exit Devices - Rim
  • Series: MSB550 Series
  • Stile Type: Narrow or Wide Stile
  • Subcategory: Rim Exit Devices
  • Wood Door Compatible: No

Professional Applications

  • Commercial Building Access Control Systems
  • Educational Facility Emergency Egress
  • Healthcare Institution Security Systems
  • Retail Store Loss Prevention
  • Industrial Facility Controlled Access
  • Government and Municipal Building Security
  • Multi-Tenant Residential Access Control

Why Choose SDC Quality?

SDC MSB550 Series switch bars deliver professional-grade reliability with heavy duty aluminum construction and all-metal mounting assemblies designed for high-traffic commercial applications. UL 294 and UL 1034 certifications ensure compliance with access control and burglary-resistant standards. Engineered for demanding commercial applications where dependable electromagnetic lock release and code-compliant egress are essential.

Manufacturer Resources

SDC Full Catalog

Product Specs

Series:
MSB550 Series
Product Group:
Exit Devices and Trim
Product Subgroup:
Exit Devices - Rim
Product Type:
Exit Devices - Rim
Subcategory:
Rim Exit Devices
Commercial/Residential:
Commercial
Stile Type:
Narrow or Wide Stile
Wood Door Compatible:
No
Product Model:
MSB550, MSB550-2, MSB550-2W
Product Size:
48"
Fire Rating:
No
Product Projection:
1-7/8"
Product Category:
Exit Devices and Trim
Department:
Door Hardware

SDC MSB550-2V48 – Frequently Asked Questions

1) Does the SDC MSB550 switch bar latch the door, or do I still need a lock?
The MSB550 is a switch bar, not a latching exit device. It has no latch and no strike. All it does is signal release of a separate electromagnetic lock when someone pushes the bar, so the opening still needs a mag lock to secure it. If you want hardware that mechanically latches the door on its own, you want a true rim panic device like the Marks USA M9900F 48 inch or the Cal-Royal 5500 48 inch push bar device instead.
2) Does the MSB550 meet egress code for a mag lock door?
That is exactly what it is for. Code requires that egress through an access controlled door not depend on prior knowledge of how the hardware works, and a push bar across the door satisfies that. Pushing the bar releases the mag lock. It is UL 294 listed for access control system units and UL 1034 listed for burglary-resistant electric locking mechanisms, with a CSFM listing.
3) Can the SDC MSB550 be used on a fire rated door opening?
The SDC MSB550 carries no fire rating, so it is not the part for a labeled opening. Fire rated rim devices in the same size class include the Marks USA M9900F in 48 inch, exit only with a panic protector end cap, the Adams Rite 3700 Series Grade 1 fire rated narrow stile device with starwheel interlocking, the Dexter ED1000-R-F-EO Grade 1 fire rated rim device, and the Orca OED85 Series 36 inch fire rated rim device. The MSB550 is best kept to non-labeled access-controlled openings secured by a maglock.
4) What is the closest equivalent to the SDC MSB550 switch bar from another brand?
The nearest peer is the Securitron EMB Electromechanical Exit Bar, which like the SDC MSB550 is a push bar that releases an electric lock rather than a latching panic device. The Securitron EMB is listed for a 2-1/4 inch door thickness. The SDC MSB550 comes in a 48 inch bar length with a 1-7/8 inch projection and is offered in three models - MSB550, MSB550-2 dual switch, and MSB550-2W weatherized dual switch - in 628 dull aluminum, 629 bright stainless, 630 satin stainless, and 335 dull black. Both suit access-controlled openings where the locking is done by a maglock or electric strike and the bar provides the code-compliant egress signal.
5) I need a 48 inch exit device that actually latches the door - what should I use instead of the SDC MSB550?
The SDC MSB550 is a switch bar that triggers release of an electromagnetic lock; it does not latch into a strike on its own. If the opening needs a mechanical latch, comparable 48 inch rim devices include the Cal-Royal 5500 Grade 2 heavy duty push bar device, the Corbin Russwin ED3200 Grade 1 crossbar rim device rated for 1-3/4 inch doors, the DORMA 9300A Grade 1 wide stile device for 1-3/4 inch to 2-1/4 inch doors, and the Dexter ED1000-R-EO in the 4FT Grade 1 version. All four latch mechanically and require no power at the door.
6) What is the difference between the SDC MSB550 and an electrified rim exit device like the Dormakaba E2103 or Sargent 12-8810?
They solve different halves of the access control problem. The SDC MSB550 is a mechanical switch bar with only 1/8 inch of bar travel whose job is to signal release of a separate electromagnetic lock. The Dormakaba E2103 with 4908A trim is an electrified rim exit device in an 08 classroom function with its own latch, and the Sargent 12-8810-LTRIM is a fire rated Grade 1 wide stile rim device with request-to-exit and motorized electric latch retraction built into the device. Choose the MSB550 when the securing device is a maglock on the frame; choose an electrified rim device when the latch itself is to be controlled.
7) Will the MSB550 still work if the door is sagging or warped?
That was the design intent. Total bar travel is only 1/8 inch, and the bar is aluminum extrusion with metal end caps on an all-metal mounting assembly, so there is nothing to flex or sag out of adjustment the way a plastic-mounted bar can. The short throw also makes the trigger quick and quiet.
8) Do I need to buy a separate power transfer for the MSB550?
No, a PT-2U power transfer loop ships with the switch bar to carry the wiring from frame to door and to make troubleshooting easier. What is not included is the electromagnetic lock itself, the power supply, and the access control side of the system.
9) How does the SDC MSB550 compare to a Securitron EMB exit bar?
Both are electrified exit bars rather than mechanical panic devices. The SDC MSB550 is a 48 inch mechanical switch bar with 1/8 inch travel that releases a separate mag lock. The Securitron EMB is an electromechanical exit bar rated for a 2-1/4 inch door thickness. If you already have a mag lock on the opening and just need code-compliant release, the MSB550 is the direct fit.
10) My opening is a narrow stile aluminum storefront - is the SDC MSB550 the right bar, or should I use a narrow stile rim device?
The SDC MSB550 is listed for both narrow and wide stile doors, so it fits a narrow stile aluminum storefront as long as the securing hardware is an electromagnetic lock. If the storefront needs a latching device instead, narrow stile rim options include the Adams Rite 8800 Series Grade 1 for 1-3/4 inch to 2-1/4 inch doors, the Corbin Russwin ED4200 Grade 1 for 1-3/4 inch doors which accepts trim, the Falcon 19-R Grade 1 exit only, and the TownSteel ED8900 Grade 1 heavy duty narrow stile device.
11) Is there an outdoor-rated alternative to the SDC MSB550 for an exterior gate or exposed door?
The SDC MSB550 line itself answers that: the MSB550-2W is the weatherized dual switch version, offered in 628 dull aluminum, 629 bright stainless, 630 satin stainless, and 335 dull black. Among latching peers there is no weatherized equivalent in the set, so for an exposed access-controlled opening the MSB550-2W paired with a maglock is the direct answer, while a purely mechanical exterior opening would take a standard Grade 1 rim device such as the Detex 40 Advantex extra heavy duty narrow stile device.
12) What finishes does the SDC MSB550 48 inch switch bar come in?
Four: 628 dull aluminum, 629 bright stainless, 630 satin stainless steel, and 335 dull black. All four are offered across the MSB550, MSB550-2 and MSB550-2W builds, so you can match existing storefront hardware on a building without changing model.
How fast can I get the SDC MSB550-2V48 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the SDC MSB550-2V48 come with a warranty?
Absolutely. The SDC MSB550-2V48 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the SDC MSB550-2V48?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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